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ibd2sdi is a utility for extracting
serialized
dictionary information (SDI) from
InnoDB
tablespace files. SDI data is present
all persistent InnoDB
tablespace files.
ibd2sdi can be run on
file-per-table
tablespace files (*.ibd
files),
general
tablespace files (*.ibd
files),
system tablespace
files (ibdata*
files), and the data
dictionary tablespace (mysql.ibd
). It is
not supported for use with temporary tablespaces or undo
tablespaces.
ibd2sdi can be used at runtime or while the
server is offline. During DDL
operations,
ROLLBACK
operations, and undo log purge operations related to SDI, there
may be a short interval of time when ibd2sdi
fails to read SDI data stored in the tablespace.
ibd2sdi performs an uncommitted read of SDI from the specified tablespace. Redo logs and undo logs are not accessed.
Invoke the ibd2sdi utility like this:
shell> ibd2sdi [options] file_name1 [file_name2 file_name3 ...]
ibd2sdi supports multi-file tablespaces like
the InnoDB
system tablespace, but it cannot
be run on more than one tablespace at a time. For multi-file
tablespaces, specify each file:
shell> ibd2sdi ibdata1 ibdata2
The files of a multi-file tablespace must be specified in order of the ascending page number. If two successive files have the same space ID, the later file must start with the last page number of the previous file + 1.
ibd2sdi outputs SDI (containing id, type, and
data fields) in JSON
format.
ibd2sdi Options
ibd2sdi supports the following options:
--help
,-h
Displays command-line help.
shell> ibd2sdi --help Usage: ./ibd2sdi [-v] [-c <strict-check>] [-d <dump file name>] [-n] filename1 [filenames] See http://dev.mysql.com/ibd2sdi.html for usage hints. -h, --help Display this help and exit. -v, --version Display version information and exit. -#, --debug[=name] Output debug log. See http://dev.mysql.com/dbug-package.html -d, --dump-file=name Dump the tablespace SDI into the file passed by user. Without the filename, it will default to stdout -s, --skip-data Skip retrieving data from SDI records. Retrieve only id and type. -i, --id=# Retrieve the SDI record matching the id passed by user. -t, --type=# Retrieve the SDI records matching the type passed by user. -c, --strict-check=name Specify the strict checksum algorithm by the user. Allowed values are innodb, crc32, none. -n, --no-check Ignore the checksum verification. -p, --pretty Pretty format the SDI output.If false, SDI would be not human readable but it will be of less size (Defaults to on; use --skip-pretty to disable.) Variables (--variable-name=value) and boolean options {FALSE|TRUE} Value (after reading options) --------------------------------- ---------------------------------------- debug (No default value) dump-file (No default value) skip-data FALSE id 0 type 0 strict-check crc32 no-check FALSE pretty TRUE
--version
,-v
Displays MySQL version information.
shell> ibd2sdi --version ibd2sdi Ver 8.0.3-dmr for Linux on x86_64 (Source distribution)
--debug[=
,debug_options
]-# [
debug_options
]Prints a debug log. For debug options, refer to Section 29.5.4, “The DBUG Package”.
shell> ibd2sdi --debug=d:t /tmp/ibd2sdi.trace
--dump-file=
,-d
Dumps serialized dictionary information (SDI) into the specified dump file. If a dump file is not specified, the tablespace SDI is dumped to
stdout
.shell> ibd2sdi --dump-file=file_name ../data/test/t1.ibd
--skip-data
,-s
Skips retrieval of
data
field values from the serialized dictionary information (SDI) and only retrieves theid
andtype
field values, which are primary keys for SDI records.shell> ibd2sdi --skip-data ../data/test/t1.ibd ["ibd2sdi" , { "type": 1, "id": 330 } , { "type": 2, "id": 7 } ]
--id=
,#
-i
#
Retrieves serialized dictionary information (SDI) matching the specified table or tablespace object id. An object id is unique to the object type. Table and tablespace object IDs are also found in the
id
column of themysql.tables
andmysql.tablespace
data dictionary tables. For information about data dictionary tables, see Section 14.1, “Data Dictionary Schema”.shell> ibd2sdi --id=7 ../data/test/t1.ibd ["ibd2sdi" , { "type": 2, "id": 7, "object": { "mysqld_version_id": 80003, "dd_version": 80003, "sdi_version": 1, "dd_object_type": "Tablespace", "dd_object": { "name": "test/t1", "comment": "", "options": "", "se_private_data": "flags=16417;id=2;server_version=80003;space_version=1;", "engine": "InnoDB", "files": [ { "ordinal_position": 1, "filename": "./test/t1.ibd", "se_private_data": "id=2;" } ] } } } ]
--type=
,#
-t
#
Retrieves serialized dictionary information (SDI) matching the specified object type. SDI is provided for table (type=1) and tablespace (type=2) objects.
shell> ibd2sdi --type=2 ../data/test/t1.ibd ["ibd2sdi" , { "type": 2, "id": 7, "object": { "mysqld_version_id": 80003, "dd_version": 80003, "sdi_version": 1, "dd_object_type": "Tablespace", "dd_object": { "name": "test/t1", "comment": "", "options": "", "se_private_data": "flags=16417;id=2;server_version=80003;space_version=1;", "engine": "InnoDB", "files": [ { "ordinal_position": 1, "filename": "./test/t1.ibd", "se_private_data": "id=2;" } ] } } } ]
--strict-check
,-c
Specifies a strict checksum algorithm for validating the checksum of pages that are read. Options include
innodb
,crc32
, andnone
.In this example, the strict version of the
innodb
checksum algorithm is specified:shell> ibd2sdi --strict-check=innodb ../data/test/t1.ibd
In this example, the strict version of
crc32
checksum algorithm is specified:shell> ibd2sdi -c crc32 ../data/test/t1.ibd
If you do not specify the
--strict-check
option, validation is performed against non-strictinnodb
,crc32
andnone
checksums.--no-check
,-n
Skips checksum validation for pages that are read.
shell> ibd2sdi --no-check ../data/test/t1.ibd
--pretty
,-p
Outputs SDI data in JSON pretty print format. Enabled by default. If disabled, SDI is not human readable but is smaller in size. Use
--skip-pretty
to disable.shell> ibd2sdi --skip-pretty ../data/test/t1.ibd
Document created the 26/06/2006, last modified the 26/10/2018
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